Matches 1 - 50 out of 197 1 2 3 4 >


Match Document Document Title
US20140239871 BOAT ANCHOR WINCH  
The invention provides a winch and method for raising and lowering a boat anchor attached to an anchor rope, comprising: an electric motor (10) operable to turn the winch in a rope raising...
US20150115857 HANDHELD POWER TOOL WITH COMPACT AC SWITCH  
A power tool is disclosed having a compact AC switch assembly. An electric motor driving the power tool is contained within a housing that includes a handle. A trigger is slidingly received in the...
US20150203328 ELEVATOR POWER MANAGEMENT  
A system for managing elevator power includes a power line connected to a power grid, a motor connected to the power line and configured to receive power from the power line to drive an elevator,...
US20140152228 DIVIDED PHASE AC SYNCHRONOUS MOTOR CONTROLLER  
A divided phase windings circuit includes motor divided phase windings, a power switch circuit comprising at least one power switch and a direct current (DC) supply circuit all at a midpoint of...
US20120187887 POWER UNIT FOR ELECTRIC VEHICLE  
A power unit for an electric vehicle includes: a first power source connected between a first node and a second node; a first switch connected between the second node and a third node; a second...
US20150028788 Enforced Zero Voltage Loop  
A method of controlling a motor is provided. The method may determine one of a switching period, a fundamental cycle, and a current target per phase leg of the motor having at least one high...
US20120187888 VOLTAGE REGULATING DEVICE  
A voltage regulating device for an electric motor has programmable control and regulation circuits carried by a circuit board mounted in a sealed support casing. The circuits have at least one...
US20140028238 Inverter Device  
The present invention includes: an electrolytic capacitor that smoothes a rectified voltage to a direct voltage; an inverter circuit that generates an alternating voltage from the direct voltage,...
US20150256116 MOTOR DRIVE DEVICE HAVING INSULATION RESISTANCE DETECTING FUNCTION AND METHOD OF DETECTING INSULATION RESISTANCE OF MOTORS  
A motor drive device includes: a converter; a power supply; a plurality of inverter units configured to convert DC to AC to drive a plurality of motors by upper arm switching elements connected...
US20140227105 DC MOTOR DEVICE AND DC FAN USING THE SAME  
A DC motor device includes a first converting circuit, a second converting circuit, and a DC motor. A switch element is coupled to the DC motor device, and provides an alternating current to the...
US20140190155 SYSTEM AND METHOD FOR ENERGY STORAGE AND RETRIEVAL  
Disclosed herein is a system including a generator/motor subsystem configured to interchangeably impart and receive mechanical force; a stiff DC bus; and power conditioning circuitry electrically...
US20150236635 INVERTER OUTPUT CIRCUIT  
An inverter output circuit for a motor that is connected to first and second nodes includes a first MOS transistor connected between a power supply line and the first node, a second MOS transistor...
US20100060224 METHOD OF CONTROLLING SPEED OF BRUSHLESS MOTOR OF CEILING FAN AND THE CIRCUIT THEREOF  
The present invention relates to a method and a circuit of controlling a speed of a brushless motor of a ceiling fan. The circuit includes a motor PWM duty consumption sampling unit and a motor...
US20120299521 ELECTRIC MOTOR AND METHOD FOR CONTROLLING THE SAME  
An electric motor (100) having a motor control system (400) including:—a current measuring means (402) for directly or indirectly measuring the electric current in the rotor windings (7) providing...
US20140191700 OPERATING STATE CIRCUIT FOR INVERTER AND METHOD FOR SETTING OPERATING STATES OF AN INVERTER  
The invention relates to an operating state circuit for actuating an inverter (3), which supplies an n-phase electrical machine (5) with an n-phase supply voltage via phase connections (4a, 4b,...
US20070296363 Rectifier and System for Controlling the Speed of an Electric Motor  
The invention concerns a reversible current rectifier, for connection to part of a polyphase network and to a continuous bus comprising a plurality of rectifier cells each rectifier cell including...
US20130200837 METHOD FOR OPERATING A WORK APPARATUS HAVING AN ELECTRIC MOTOR AND WORK APPARATUS HAVING AN ELECTRIC MOTOR  
An electric motor in a work apparatus has a power characteristic line which runs between a lower rotational speed of the electric motor and an upper rotational speed of the electric motor. The...
US20120091939 HIGH VOLTAGE DC ELECTRIC POWER GENERATING SYSTEM WITH PERMANENT MAGNET GENERATOR PROTECTION  
A permanent magnet generator system provides protection from fault conditions. The system includes a permanent magnet generator having a first, second, and third winding wherein each winding has a...
US20140015465 VOLTAGE INCREASING CONTROL CIRCUIT AND POWER TOOL  
A voltage increasing control circuit is connected to a power supply to regulate power supplied to a load. The voltage increasing control circuit includes a voltage increasing unit configured to...
US20150048770 ACCURATE CURRENT SENSING IN H-BRIDGE APPLICATIONS WITHOUT AMPLIFIER HAVING HIGH COMMON MODE REJECTION RATIO  
A current sensing circuit may include a shunt resistance through which current to be sensed travels. A first and a second differential amplifier may each provide an amplified output of the voltage...
US20140184124 COMPUTING DEVICE AND METHOD FOR PROTECTING FAN OF COMPUTING DEVICE  
In a method for protecting a fan of a computing device, firstly, a current supplied to the fan is read. Secondly, if the current supplied to the fan is more than or equal to a predefined current,...
US20150102758 MOTOR DRIVE CONTROLLER, MOTOR DRIVE CONTROL METHOD AND MOTOR SYSTEM USING THE SAME  
There are provided a motor drive controller, a motor drive control method, and a motor system using the same. The motor drive controller may include: a voltage-vector providing unit generating...
US20130119915 VARIABLE SPEED TRIGGER MECHANISM  
A variable speed trigger mechanism that allows a user to reverse a direction of a motor and supply variable amounts of power to the motor using a single trigger mechanism. In a first motion, the...
US20150137725 THRUST-REVERSAL DEVICE FOR AN AIRCRAFT INCLUDING AT LEAST TWO THRUST REVERSERS  
A thrust reverser device for an aircraft includes at least two thrust reversers, and each of them includes a movable cowl movably actuated by an actuator driven by an electric motor. The electric...
US20150077030 DUAL INVERTER SYSTEM AND METHOD OF CONTROLLING THE SAME  
A dual inverter system to drive a motor in an electronic apparatus and a method of controlling the same include a first inverter connected to one side of a stator winding of the motor to modulate...
US20120181968 METHOD FOR CONTROLLING OPERATION OF AN ELECTRIC MOTOR IN A HEIGHT-ADJUSTABLE FURNITURE ARRANGEMENT  
The present invention relates to a method for controlling operation of an electric motor in a height-adjustable furniture arrangement, wherein operation of the electric motor provides a...
US20140145666 INTEGRATED CIRCUIT FOR MOTOR DRIVE CONTROLLER APPLICATIONS  
An integrated circuit is configured for controlling automobile door lock motors. The circuit includes half-bridge driver circuits, with each half-bridge driver circuit having an output node...
US20150236634 SERIES CONNECTED DC INPUT INVERTERS  
A multi-level converter includes a first multi-phase inverter and a second multi-phase inverter. The first multi-phase inverter includes a first direct current (DC) positive line, a first DC...
US20150097506 Voltage Step-up Six-phase Autotransformer Passive Rectification AC-DC Converter  
A three phase step-up autotransformer construction is discussed herein. The passive 12-pulse AC-DC converter offers simplicity, high reliability and low cost solution to AC-DC power conversion....
US20090096403 MOTOR CONTROL  
A method of controlling a current of a three-phase electric motor with a three-phase controller. The firing angles are adjusted so as to leave a range of firing angles in which DC components appear.
US20090167230 MOTOR DRIVING CIRCUIT AND MOTOR DRIVING METHOD  
A motor driving circuit includes a detecting unit, a signal control unit, a comparing unit and a driving unit. The detecting unit detects a rotation speed of a motor and thus outputs a detecting...
US20150194922 MOTOR DRIVE DEVICE INCLUDING INSULATION DETERIORATION DETECTION FUNCTION AND INSULATION RESISTANCE DETECTION METHOD OF MOTOR  
A motor drive device of the present invention includes: a rectification circuit configured to rectify an AC voltage; a power source unit configured to smooth a DC voltage by a capacitor; an...
US20120126728 INTEGRATED ELECTRIC MACHINE AND SILICON CARBIDE POWER CONVERTER ASSEMBLY AND METHOD OF MAKING SAME  
An electric drive system comprising an electric machine comprising a rotor and a stator, a power converter electrically coupled to the electric machine and configured to convert a DC link voltage...
US20120299522 TWO-QUADRANT CHOPPER  
A two-quadrant chopper including a first node, a second node, a third node and a fourth node wherein an input voltage may be applied between the first node and the second node, a first output...
US20140222294 AUXILIARY POWER SUPPLY DEVICE AND ELECTRIC POWER STEERING SYSTEM INCLUDING AUXILIARY POWER SUPPLY DEVICE  
An auxiliary power supply device includes a capacitor that is connected to a main power source, and that is able to discharge an electric current to an electric motor, the main power source...
US20130342152 MULTI-SHAFT MOTOR DRIVE DEVICE AND MULTI-AXIS MOTOR DRIVE SYSTEM  
A multi-shaft motor drive device comprises at least one amplifier module, a control substrate, and a power substrate. The at least one amplifier module is configured to supply power to at least...
US20140062376 FAN MOTOR  
A fan motor, including: a variable speed motor and a motor controller. The motor controller includes: a microprocessor, an inverter unit, a gear detection unit, and a power supply unit. The power...
US20090015185 Semiconductor Module, and Hybrid Vehicle Drive Device Including the Same  
A bus bar constitutes a power line and another bus bar constitutes an earth line. The bus bars are layered in the normal direction of an insulating substrate via an insulating member. Here, the...
US20130076277 SYSTEM AND METHOD FOR CURRENT ESTIMATION FOR OPERATION OF ELECTRIC MOTORS  
Methodologies and systems are provided for current estimation in electric motor. The system comprises an electric motor having sensors for sensing at least motor current, motor temperature and...
US20150171775 MOTOR DRIVING DEVICE AND AIR CONDITIONER INCLUDING THE SAME  
A motor driving device and an air conditioner including the same are disclosed. The disclosed motor driving device includes a rectifier to rectify input AC power, and a converter to convert the...
US20130193898 Motor Control with Voltage Harmonic Shaping  
A control system for an electric motor comprises a current sensing means arranged to produce a current sensing output indicative of electric current in the motor, current control means arranged to...
US20150042255 CONTROLLING AN ELECTRICALLY-DRIVEN ACTUATOR  
In some aspects, an actuation system includes an electrical positioning driver and an electrically-driven actuator. A voltage boost converter in the electrical positioning driver receives an input...
US20140077744 MOTOR DRIVING DEVICE FOR ADJUSTING MOTOR SPEED AND SETTING THE LOWEST ROTATING SPEED AND THE DRIVING METHOD THEREOF  
A motor driving device and a driving method thereof is disclosed herein and comprises a PWM converting circuit, an oscillator, a comparator, a controlling unit. The PWM converting circuit converts...
US20140232316 CONTROL MODULE FOR A MOTORIZED SURGICAL TOOL, THE MODULE INCLUDING A TRIGGER SENSOR, A MOTOR ROTOR SENSOR AND A CONTROL CIRCUIT THAT ARE SEALED FROM THE AMBIENT ENVIRONMENT  
A control module for a motorized powered surgical tool. The module includes a trigger sensor, a motor rotor position sensor and control circuit. The trigger sensor and motor rotor position sensor...
US20150002069 DRIVING SWITCHING SYSTEM APPLIED TO MOTORS  
A driving switching system includes an H-bridge circuit, at least a kickback voltage detection module and at least a driving module. The H-bridge circuit includes a first P-type MOSFET, a first...
US20100327795 CONVEYOR SYSTEM  
A conveyor system includes an electric motor to move a conveyor. A voltage determining device is coupled to an alternating-electricity source that supplies alternating electricity to the conveyor...
US20090009122 FAN MOTOR SPEED CONTROL CIRCUIT, FAN APPARATUS, AND ELECTRONIC APPARATUS  
A fan motor speed control circuit includes: a driving circuit configured to drive a fan motor so as to run at a rotation speed corresponding to a drive signal; a comparison circuit configured to...
US20100052591 MOTOR DRIVING CIRCUIT FOR ADJUSTING SPEED OF A MOTOR BY CHANGING AN OUTPUT VOLTAGE  
A motor driving circuit for adjusting speed of the motor by changing output voltage is disclosed. One end of the motor is coupled to a variable voltage source. The motor driving circuit includes a...
US20090058341 Control method and system with feedback indicative of load flux  
Systems, methods, and devices are disclosed, including an induction-motor controller having a phase path; a solid-state switch interposed on the phase path; and a controller coupled to the...
US20140292246 MEDIUM VOLTAGE INVERTER SYSTEM  
A medium voltage inverter system is provided. The inverter system includes a controller configured to short-circuit the output terminal of the inverter unit when failure occurs, a supply unit...

Matches 1 - 50 out of 197 1 2 3 4 >